Locomotive boiler



Sept. Y, 1931. E. J. REARDON LocoMoTIvE BoILER Filed May 16. 1928 0 O 0O O O O O O Patented Sept. 1, 1931 EDwAnn J. 'JaEAnDorL sites vIreni'orl-'ice or 'crashed ILLfrNors, 'assienoa roL rooomofnvn rIRE-BoxAplilicatien med May -16, Serial No. 278,061.

This invention relates to improvements in locomotive boilers and itconsists of the matters hereinafter described and moreparticularlypointed out in the appendedelaims.

" 15 The primary object 'of the invention is to provide in a locomotiveboiler embodying the well known Nicholson thermic siphon in the fireboxthereof, a'new-and novel Vconnection for the inlet or neclr endfof thesiphon with the front end corner of one of the side water lega wherebynot only a forward circulation of the water therein is produced in saidlegs but a lateral water circulation is established in the front waterleg thus increasing the water movement and steaming' characteris- '725products of combustion in the firebox, thus increasing,` the efliciencyof the boiler as a whole.

These objects of the invention as well as others together with the manyadvantages thereof will more fully appear as I proceed with myspecification. 1

In the drawings Fig. 1 is a Vertical longitudinal sectional view throughthe firebox end of a locomotive boiler embodying` my invention.

Fig. 2 is a transversc Vertical sectional view through the same onthe-line 2-2 of Fig. 1.

Fig. 3 is a fragm-entary detail view partly in elevation and partly insection of a slightly modified form of the invention which will be morefully described later. r

Referring now in detail to that embodiment of the invention illustratedin Figgs. 1 and 2 of the accompanying' drawingsz-The locomotive boilerfirebox shown therein 'comprises a fire Chamber which :itends from theback sheet 1 to the flue sheet 2 and from one to the other of the sidesheets 3 with a grate or bottom indicated by the dotted` line 4 inFig. 1. Said grate, as shown herein, extends po from the back sheet 1 toan inner throat sheet 5 whichis preferably integral with the fluesh-eet. The top of the fireboX is formed by a crown sheet G whichextends from the back sheet 1 to the flue 'sheet 2. l V f.

` In the rear sheet 1 is provided the usual fuelv dooropening 7 and tothe front or flue sheet are connected the usual fiues 8 through whichthe products of combustion are drawn by the exhaust nozzle (not shown)in the'fo manner well known. i The firebox is enclosed by a top plate 9and the usual side-plates 10` together with the outside throatplatell-and back plate 12 which-provides what is commonly termed the-wrapperof the boilerx'rfi5 Such plates together with the Sheets of the fireboxdefine the side water legs 13 and front and 'rear waterlegs 14 and 15 ofthe boiler, all ofwhieh are Closed atftheir bottomends by the mud ring16. The inner sheets defin-' 'ing the firebox'and the outer or wrappersheets are joined or stayed together by the usual staybolts 17. f

lVithin the firebox is located one or more substantially hollow elements18 which in this '75 instanee Conduct water from the forward bottom endsof the side water legs ofvthe boiler fireboxand in this instance two Vofsuch elements are shown`l one on each. side of the long'itudinalinedianplane of the fireboX.

1 Each water circulating'element or body 35 comprises a substantiallytriangularly shaped V'fiat' hollow body 20- with an upwardly andrearwardly inclined bulge'd bottom 21. The sidesrof said body arestayboltedtogether fand form at the top thereof a'longitudinally` Teofelongated discharge openingthat is defined by an outwardly extendingflange 22' fixedin an opening in the crown sheet for that purnose. Thebottom bulged portion` extends forwardly and downwardly beyond Vthe body'95 in the form of a tube 23 which is bentdownf wardly and laterallyV incurves of generous ra'dii to provide an inlet neck for the siphon. Thisneclr opens through and is fixed inthat corner of the adjacentassociated side sheet '10 near the mud ring and front sheetrespectively. Preferably that portion of the side sheet in which saidneck is fixed is made in the form of a flexible diaphragm 3a but thisfeature is not absolutely essential to the broader aspects of theinvention.

The water circulating element and its neck is usually made from a singlesheet of metal and the welded seam is at the front end thereof andextends down along` the neck and to strengthen the neck against interiorpressures stay-bolts 24 are employed and these staybolts extend at aright angle to the plane of the seam which seam is on the top side ofthe neck where it enters the side sheet.

In Fig. 3 Ihave shown a slightly modified form of neck constructionwhich is'as followsz-Instead of making the curved neck part as anintegral part of the siphon, I may make it from a single piece 25 ofseamless tubing and butt weld it at one end as indicated at 26 to theneck extension 28a as shown in said Fig. 3. This constructionisadvantageous in that it eliminates the use lof stay-bolts therein andpermits a free and `uninterrupted sweep of the water through the neck.Again the neck is that part of the element which receives the heaviestbombardment of the products of combustion and V ing action, keeping theneck Clear and free o from sediment and is then vdischarged out throughthe top endof the element into the water space above the crown sheet.Thus there is created a flow of the colder water at the bottom of theVwater legs and boiler spaces so that such Water is more thoroughlymixed with the hotter water of the boiler whereby steaming efficiency isincreasedand unequal boiler strains due to 'temperature differences areeliminated.

' WVhile in describing my invention,rI have referred in detailto theform and arrangement of the various parts thereof, the same fi's to beconsidered as by way' of illustration only so that I do not wish to belimited thereto except as may be pointed1 out in the appended claims.

I claim as my invention 1. A locomotive boiler embodying' therein afirebox including side sheets, a crown sheet and front and rear sheets,a substantially rigid, water circulating element disposedin the fireboxand'having Van elongated discharge end that opens through the crown 1sheet and has a tubular inlet neck portion that curves downwardly andlaterally to open through one of said side sheets at one of the cornersof the'firebox near the bottom thereof.

2. A locomotive boiler Vembodying therein a firebox including sidesheets, a crown sheet and front and rear'sheets, a substantially rigidwater circulating Velement disposed in the firebox and having anelongated discharge end that opens through the crown sheet and has atubular inlet neck portion that curves downwardly and laterally andopens through the adjacent side sheet at the front bottom cornerthereof.

3. In combination with a thermic siphon having a substantiallytriangularly shaped flat body portion with a bulged bottom ex- 'tendingbeyond one endof said body to form a tubular neck portion andadownwardlyV and laterally curved seamless neck member secured to saidtubular-neck portion.

In testimony whereof, I have hereunto set my hand, this lOth day of May,1928.

EDVVARD J. REARDON.

